corrected vertical position of LaTeX Math fonts, but this may hurt the font? just wait for bugs

TODO

@@ -1,19 +1,17 @@
 z-index for space span
-fake space detection
+fake space detection -> Unicode U+200B
 manpage
 
+disable selection if we know unicode is wrong
+
+compress div/span
+
 option to break ligatures
 check if we can add information to the font, and let browsers show ligatures automatically
 
 use absolute positioning for long whitespace
 solution/workaround for latex math fonts
 
-wiki page
-- why the html looks ugly : use a modern web browser, use Linux/Mac, (enabling ClearType for Windows XP)
-- why got incorrect text after copy&paste : try ligature or always-apply-unicode
-- why text are so small : set --zoom or zoom in the page
-- why images are blurred : set higher dpi
-
 ==Future==
 custom html/css
 native support for image

share/all.css

@@ -1,5 +1,4 @@
 #pdf-main {
-  font-family: sans-serif;
   position:absolute;
   top:0;
   left:0;
@@ -10,37 +9,38 @@
   /* for Chrome & Safari */
   -webkit-text-stroke-width:0.13px; 
 }
-#pdf-main .p {
+.p {
   position:relative;
   margin:13px auto;
   background-color:white;
   overflow:hidden;
   display:none;
 }
-#pdf-main .l {
+.l {
   position:absolute;
   white-space:pre;
-  font-size:1px;
-  transform-origin:0% 100%;
-  -ms-transform-origin:0% 100%;
-  -moz-transform-origin:0% 100%;
-  -webkit-transform-origin:0% 100%;
-  -o-transform-origin:0% 100%;
-}
-#pdf-main span {
-  position:relative;
   line-height:0;
+  height:0;
+  font-size:0;
+  transform-origin:0% 0%;
+  -ms-transform-origin:0% 0%;
+  -moz-transform-origin:0% 0%;
+  -webkit-transform-origin:0% 0%;
+  -o-transform-origin:0% 0%;
+}
+span {
+  position:relative;
   vertical-align: baseline;
 }
-#pdf-main ._ {
+._ {
   color:transparent;
 }
-#pdf-main ::selection{
+::selection{
   background: rgba(127,255,255,1);
 }
-#pdf-main ::-moz-selection{
+::-moz-selection{
   background: rgba(127,255,255,1);
 }
-#pdf-main .i {
+.i {
   position:absolute;
 }

src/BackgroundRenderer.cc

@@ -18,6 +18,6 @@ void BackgroundRenderer::drawChar(GfxState *state, double x, double y,
   double originX, double originY,
   CharCode code, int nBytes, Unicode *u, int uLen)
 {
-//    SplashOutputDev::drawChar(state,x,y,dx,dy,originX,originY,code, nBytes, u, uLen);
+    SplashOutputDev::drawChar(state,x,y,dx,dy,originX,originY,code, nBytes, u, uLen);
 }
 

src/HTMLRenderer.h

@@ -152,6 +152,7 @@ class HTMLRenderer : public OutputDev
         void export_remote_font(long long fn_id, const std::string & suffix, const std::string & fontfileformat, GfxFont * font);
         void export_remote_default_font(long long fn_id);
         void export_local_font(long long fn_id, GfxFont * font, const std::string & original_font_name, const std::string & cssfont);
+
         void export_font_size(long long fs_id, double font_size);
         void export_transform_matrix(long long tm_id, const double * tm);
         void export_letter_space(long long ls_id, double letter_space);

src/HTMLRenderer/export.cc

@@ -12,6 +12,7 @@
 
 #include "HTMLRenderer.h"
 #include "namespace.h"
+#include "config.h"
 
 using boost::algorithm::ifind_first;
 
@@ -29,9 +30,7 @@ void HTMLRenderer::export_remote_font(long long fn_id, const string & suffix, co
         allcss_fout << fn;
     }
 
-    allcss_fout << format(")format(\"%1%\");}.f%|2$x|{font-family:f%|2$x|;") % fontfileformat % fn_id;
-
-    allcss_fout << "}" << endl;
+    allcss_fout << format(")format(\"%1%\");}.f%|2$x|{font-family:f%|2$x|;}") % fontfileformat % fn_id << endl;
 }
 
 static string general_font_family(GfxFont * font)
@@ -66,7 +65,6 @@ void HTMLRenderer::export_local_font(long long fn_id, GfxFont * font, const stri
     allcss_fout << "}" << endl;
 }
 
-
 void HTMLRenderer::export_font_size (long long fs_id, double font_size)
 {
     allcss_fout << format(".s%|1$x|{font-size:%2%px;}") % fs_id % font_size << endl;

src/HTMLRenderer/install.cc

@@ -245,6 +245,20 @@ void HTMLRenderer::install_embedded_font(GfxFont * font, const string & suffix,
     if(ctu)
         ctu->decRefCnt();
 
+    /*
+     * Fontforge cannot set the ***Ascent value for nonTTF fonts
+     * So save to a temp ttf file and open it again
+     */
+    string tmpfn = fn + "_.ttf";
+    add_tmp_file(tmpfn);
+
+    script_fout << format("Generate(%1%)") % (tmp_dir / tmpfn) << endl;
+    script_fout << format("Open(%1%)") % (tmp_dir / tmpfn) << endl;
+
+    for(const string & key : {"Win", "Typo", "HHead"})
+    {
+        script_fout << "SetOS2Value(\"" << key << "Ascent\", 0)" << endl;
+    }
     script_fout << format("Generate(%1%)") % ((param->single_html ? tmp_dir : dest_dir) / (fn+".ttf")) << endl;
     if(param->single_html)
         add_tmp_file(fn+".ttf");

src/HTMLRenderer/state.cc

@@ -352,8 +352,8 @@ void HTMLRenderer::prepare_line(GfxState * state)
             double x,y; // in user space
             state->transform(state->getCurX(), state->getCurY(), &x, &y);
 
-            html_fout << format("<div style=\"left:%1%px;bottom:%2%px;\" class=\"l t%|3$x|\"><em></em>") 
-                % x % y % cur_tm_id;
+            html_fout << format("<div style=\"left:%1%px;top:%2%px;\" class=\"l t%|3$x|\">")
+                % x % (pageHeight-y) % cur_tm_id;
 
             //resync position
             draw_ty = cur_ty;